I have some ways to fix it !
1.Drink a cup of Green Tea a few hours before the bed
2.stay away from your digital devices a few hours before the bed
3.try to wake up earlier and sleep earlier (little by little ) It's healthy to sleep around 10-11 and wake up around 6-7 am
4.try to sleep in a darker place and trun off all of the lights
5.let tet fresh air come into your room
6.avoid stress and read a nice book before sleeping
7.before sleeping think about good memories and try to forget bad memories
8.have some prayers (if you believe in those things )!
9.ِDrink chamomile tea (It's very common in my country people drink if they have some sleeping problmes )
Hope you can fix that ,hope i could help